Distance between cities › USA › South Dakota › Custer, SD › Distance from Custer to Merrillan Book Hotels

Distance from Custer, SD to Merrillan, WI

Distance

715 mi

Time

12 hours 42 mins

Gas Cost

$67 - $129

There are 634.03 miles from Custer to Merrillan in east direction and 715 miles (1,150.68 kilometers) by car, following the I-90 and US-14 route.

Custer and Merrillan are 12 hours 42 mins far apart, if you drive non-stop .

This is the fastest route from Custer, SD to Merrillan, WI. The halfway point is Humboldt, SD.

Please note the time difference between Custer, SD and Merrillan, WI is 1 hour. The current time in Custer is 2:55 am and the current time in Merrillan is 3:55 am.

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Lowest Price Rental Cars in Custer, SD

Planning on renting a car to go from Custer, SD to Merrillan, WI? Here there are some offers to rent a car in Custer, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Custer »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 28.70 gallons of gas to cover the route between Custer, SD and Merrillan, WI.

The estimated cost of gas to go from Custer to Merrillan is $93.61.

During the route, an average car will release 562.26 pounds of CO₂ to the atmosphere. The carbon footprint would be 0.79 pounds of CO₂ per mile.

Average USA gas price used for calculation is $3.26 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Custer, SD and Merrillan, WI

If you want to meet halfway between Custer, SD and Merrillan, WI or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.614330 and -97.032921, or 43º 36' 51.588" N, 97º 1' 58.5156" W. This location is 357.29 miles away from Custer, SD and Merrillan, WI and it would take approximately 6 hours 21 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Humboldt, SD, situated 364 miles from Custer, SD and 373 miles from Merrillan, WI. It would take 5 hours 1 min to go from Custer to Humboldt and 5 hours 38 mins to go from Merrillan to Humboldt.

Major City Closest to Halfway Point

The major city closest to the halfway point between Custer, SD and Merrillan, WI is Sioux Falls, SD, situated 387 miles from Custer, SD and 357 miles from Merrillan, WI. It would take 5 hours 21 mins to go from Custer to and 5 hours 27 mins to go from Merrillan to Sioux Falls.